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Molecular Imaging to Target Transplanted Muscle Progenitor Cells
Published on: March 27, 2013
MiR-92b-3p inhibits proliferation and migration of C2C12 cells
Zijian Ye1, Jia Shi1, Zuocheng Ning1
1Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University , Guangzhou, Guangdong, China.
Abstract:
Skeletal muscle, a critical component of the mammalian body, is essential for normal body movement. miRNAs are well documented in gene post-transcription regulation in many biological processes, including muscle development and maintenance. miR-92b-3p, which is often associated with tumorigenesis, has never been explored in myoblast development. Here, we used murine-derived C2C12 myoblasts to explore the potential functions of miR-92b-3p in skeletal muscle development. Our results demonstrated that miR-92b-3p mimics inhibited C2C12 cell proliferation and migration, whereas miR-92b-3p inhibitor promoted C2C12 cell proliferation and migration. C2C12 cell differentiation was not affected by miR-92b-3p mimics, according to immunofluorescence and qPCR results. Serum- and glucocorticoid-induced kinase 3 (SGK3) was predicted and validated as a target of miR-92b-3p. Overexpression of SGK3 promoted C2C12 cell proliferation. SGK3 and miR-92b-3p formed a regulatory pathway to modulate C2C12 cell proliferation. In conclusion, miR-92b-3p inhibited C2C12 cell proliferation by targeting SGK3 and impeded C2C12 cell migration.
Insights
MicroRNA-92b-3p (miR-92b-3p) inhibits skeletal muscle cell proliferation and migration by targeting SGK3. This study reveals a novel regulatory pathway impacting myoblast development and function.
Area of Science:
- Molecular Biology
- Cell Biology
- Muscle Physiology
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression, influencing diverse biological processes.
- While miR-92b-3p is linked to cancer, its role in skeletal muscle development remains unexplored.
- Skeletal muscle is vital for mammalian locomotion and requires precise regulation during development and maintenance.
Purpose of the Study:
- To investigate the function of miR-92b-3p in the development of skeletal muscle.
- To identify the molecular targets and regulatory mechanisms of miR-92b-3p in myoblasts.
- To explore the potential impact of miR-92b-3p on myoblast proliferation, migration, and differentiation.
Main Methods:
- Utilized murine-derived C2C12 myoblasts for experimental studies.
- Employed miR-92b-3p mimics and inhibitors to modulate its expression levels.
- Applied immunofluorescence and quantitative PCR (qPCR) to assess cell differentiation.
- Bioinformatic prediction and experimental validation identified SGK3 as a direct target of miR-92b-3p.
Main Results:
- miR-92b-3p mimics significantly inhibited C2C12 cell proliferation and migration.
- Conversely, miR-92b-3p inhibitors promoted C2C12 cell proliferation and migration.
- Cell differentiation was not observably affected by miR-92b-3p modulation.
- Serum- and glucocorticoid-induced kinase 3 (SGK3) was confirmed as a direct target, and its overexpression enhanced proliferation.
Conclusions:
- miR-92b-3p acts as an inhibitor of skeletal muscle cell proliferation and migration.
- The miR-92b-3p/SGK3 axis represents a novel regulatory pathway in myoblast development.
- These findings provide insights into the molecular mechanisms governing skeletal muscle growth and function.
